Apparatus for applying treating mediums



G. ORNSTEIN ogf. 23, 1945.

.2,387,406` v APPARATUS FOR APPLYING A TREATING MEDIUM 2 sheets-sheet iFiled sept. 4, 1942 GEORG' I BY ArroR/vgv Od 23,1945- G. oRNsTElN2,387,406

l APPARATUS FOR APPLYING A TREATING MEDIUM Filed Sept. 4, 1942Z'Sheets-Sheetz /27 s l? y 2 a 3 A T TOR/VE Y certain varying quantityof liquid will s this exposure certain Patented Oct. 23, 1945 UNITEDSTATES PATENT OFFC APPARATUS FOR APPLYIN G TREATIN G MEDUMS GeorgOrnstein, New York, N. Y.

Application September 4, 1942, Serial No. 457,293

14 Claims.

t `My invention relates to an apparatusfor supplying a treating medium,`preferably a treating `gas at a controlled rate and more particularly toan apparatus `for supplying chlorine or sulphur dioxide gas at acontrolled and measured rate to a flowing medium, such as water, forinstance, water of cities or sewage.

f In the treating of water with chlorine or any other suitable treatinggas, the chlorine is fed into the stream of water to be treated. Inorder to know the amount o! chlorine `being supplied, the rate of supplyof chlorine must be accurately con trolledand measured. Various methodsof con, trol areknown. One that is widely `known and has `beenpreferably used in chlorine-controlled l `apparatus is to cause the gasto pass through a flow-controlling orifice and to control the rate of owof `the gas `by Vmeasuring and varying the `drop ofl pressure across theoriiice.

`Apparatus based on this method of control comprise a container such asa belL-J'ar into which treating medium, `for example, chlorine gas, isad,-

mitted `and means for withdrawing the treating `medium after it haspassed through the now-controlling opening. The container is partlyfilled with` a suitable liquid, such as water, the level of which islcontrolled by the suction of apartial vacuum maintained in saidbell-jar. Hence, a besucked flow outagain after having treating medium.`During `quantities of the treating medium, for example, chlorine, willbe dissolved 11,1 4the treating medium and escape from the con, tanerwhen the liquid ows from the container into the open. Such escapingquantities of chloe `rino or other treating medium may not be dan?gerous but they produce a very unpleasant odor. They will also tarnishand even corrode metal `parts exposed to them. r

:iA principal object of `my invention is to provide means for preventingany iiow of liquid in which treating medium, suchas chlorine gas, is ormay be dissolved from a closedpart of theapparatus into the open where`it may produce an unpleasant odor or tarnish and corrode metal "partainto the container and `been exposed to the t `fgmcrespecic object of myinvention is to pro- :vde means permitting the flow of vliquid from asupply of liquid inte a closed part of the auf paratus anddischarging.any exposed liquid when i `leaving theclosed part of the apparatusdirectly ihtdvastefo? any intended other .Place weer? beersemoatmsftomtheexposedliquid are not ef any offensive, and where there is no dangerof tarnish or corrosion of metal parts.

Another object of my invention is to provide connecting means permittinga free flow of liquid between open and closed parts of the apparatus andto include a chemical valve in these connect.- ing means that preventsthe escape of dissolved treating'medium into an open part of the ap,-paratus.

Other and further objects of my invention will hereinafter be set forthand the novel features thereof dened by the appendedclaims.

My invention is applicable to various apparatus for supplying a treatingmedium of the class described. It is particularly no-t iimitedto the useof any specic means 'for controlling the pres.. sure drop across theflow-controlling orifice. My invention is equally useful whether thepressure of .the treating medium is controlled on the une stream side oron the downstream side of the orice. `loyaux means whatsoever. t

My present application is a continuation in part of my cofpendineapplication Ser. No. 426,165.. filed J anuary 9, 1.942J and mycofpencling application Sen No..44;1 ,2611, leci May 1, 1.942.

In. the accompanying drawings several embodv ments of myy invention areshown. l

Figure l Shows a sectional side View of a sealing device according to myinvention in combination with ,a `.chlorinator with pressure regulationon ghe downstreamside of the flow-controlling .ori-

Figure i2 a t0 Figur? ,1-

Figure 3 is a sectional side View of a modifica tion .of Va deviceaccording to the linvention in Combination with a chlorinator withpressure regulation on the upstream side of the flow-oon,- trollogorifice, .and

Figure 4 is a third embodiment of a sealing ydevice according to myinvention in combination with a .chlorination of the type 4shown inFigures lande, Y

The chlorinator shown in Figure i comprises tray or ,open `receptacle l,which may be made suiiablematenal, for example hard nibe ber or materialknown linde;` the trade Vname Luciter and which is ,Supported by a,standard .z2 of `Co@volliobal @esisti- In the tray aco-nteirler .Suchas a bell jar 3 of preferably transparent material, ,for example glassis piececi- Bell lar 3 ,is to the bottom of tray I ,for in- ,sftanoa by,inserting .it into a circular groove 4. in tray l a body liquid SuchWater' is maintained at a predetermined level, preferably Plan view of,a device according by an over-flow tube 6. The water may be admittedthrough spigot 'I. The admission of water can be controlled by a valve 8or a float valve of conventional design. A treating medium, for examplechlorine gas is admitted into bell-jar 3 through a pipe 9 which iscontrolled by a conventional valve I. Pipe or tube 9 is provided at itstop with a float valve II having a iioat I2. Float valve I I will openand admit fresh chlorine gas as soon as the liquid I3, for examplewater, within bell-jar 3 reaches a certain level. If the water dropsbelow this level the float valve will close again. By this means, aconstant water level may be maintained inside bell-jar 3, irrespectiveof the level of water in tray I andra constant flow of chlorine gas isassured.

In order to permit the exchange of water between bell-jar and tray, itis known to provide vents or passages permitting the iiow of liquid fromthe tray into the bell-jar and vice-versa. u

While water is within bell-jar 3, it is exposed to chlorine gas admittedintol bell-jar 3 and certain quantities of chlorine will be dissolved inthe water. When such exposed water flows back into tray I,the dissolvedchlorinewill produce a very unpleasant odor and tarnish or corrode anirexposed metal. parts. Such backflow of water is usually due to a slightleakage of valve I I which in practice is often unavoidable. Inaccordance with rny invention, I prevent any escape of such exposedWater from the bell-jar into the open. As previously explained, I avoidany direct comin any other suitable point that it is only slightlylarger than the diameter of orice 2'I. This restriction of tube 24 willreduce the amount of water which can be aspirated through tube 24without aiecting the volume of chlorine that can be sucked into oricetube 26.

When water is admitted by spigot 1 into tray I the water level outsideof bell-jar 3 will rise until the water reaches the edge of Vover-flowtube 6. The admitted water will flow through conduit I4 and seal I5 intobell-jar 3 since the seal is only open in the direction indicated by thearrows.

munication between the tray and the interior of thebellfjar by sealingbell-jar 3 to the bottom of tray I. The tray is connected with bell-jar3 by a conduit I4. In this conduit is included a Yseal of anysuitabledesign permitting the now of.liquidonly in the direction indicated byarrows.4 I have found it preferable to use a seal I5 comprising acontainer I6 which is partly filled With any suitablesealing liquidI'I,' for example water;` Conduit I4 is passed through the bottom oftray I and 4preferably iiush4 with it. In order to Adischarge'liquidfrom container 3 to waste, I provide communicating tubes I8; One ofthese tubes; tube I9 isextended into bell-jar 3. It may end at the samelevel as overilow Atube 6 or below `this level. The other tube 20 isdisposed outside ofr bell-jarV 3 and preferably arranged withinl aclosed cbntainer 2I which is provided with ablow-oi pipe 26. Tube 20should preferably end at ,the same level asv overflow tube 6. 'A tube'22serves'to discharge liquid from container 2l into waste or any otherplace'where chlorine odors are not oiensive.

Passing up through the bottom of tray I is a pipe 23 which communicateswith the throat of an aspirator or injector 64. This injector maybewcontrolled by a valve 65 of conventional design. VA current ofliquid, for example water, is iiowing through injector 64 and producesthe lnecessary suction power. With the upper end of tube 23 a secondtube 24 is pivotally connected. I 'he pivotal connection can be made byany suitable means, for instance, by a joint 25 which is provided with apassage connecting tubes 23 and 24. Tube 24 is surmounted by a metertube 26 containing a small oriiice 2 in its otherwise vclosed top. Thelower end `of tube 26 is open and extends below the level of the waterin bell-jar `3. V-Tube 26 is secured to inner tube 24 by anysuitable-means, for instance byV brackets or cross bars '28 and can bepivoted' together with tube '24 aboutjoint 25. The inner diameterof tube24 is preferably sofar reduced at its top 29 or The air in container I6is compressed by liquid I'I until it balances the column h. Waterentering container I6 from tray I will ooze out from conduit I4 and acorresponding amount of water will be forced into jar 3 by the aircushion in containerA I6, since the water column h will not balance ahigher water level in container I6. Water trying to enter container I6from jar 3 cannot reachconduit I4 leadingrto tray l but willV merelycompress the air above liquid I'I slightly which will result in thedischarge of some air through conduit section I4 leading into tray I. i.

The liquid level within bell-jar` 3 will rise until it correspondsapproximately to the water level outside of the bell-jar. As soon asaspirator |54 begins to operate, the suction produced by it will drawchlorine through orifice 21 from the upperpart or the bell-jar, throughtube 24, joint 25 and tube 23 into the throat of the aspirator. Thesuction of the aspirator produces a partial vacuum in the bell-jar andcauses the level oi the water therein to rise above that in tray I asindivcated in Figure 1. The rate of flow of chlorine is determined bythe difference in pressure in the bell-jar and within oriiice tube 26.Since the capacity of the aspirator is greater than the amount of gasadmitted through orifice 2'I in the top of tube 2B and since the lowerend of tube 26 is open and .below the level of the water in thebell-jar, the suction of the aspirator will causeto rise the level ofthe water in tube 26 up tothe level of the top of tube 24. A certainamount of the raised water will flow off through tube 24 in which it ismixed with the aspirated chlorine. The solution of chlorine and waterthus -formed will loev discharged into the stream of liquid flowingthrough injector 64.' The pressure acting todraw oif the gas will beindicated by the diierence of the level oiy water in tube' 26 and thewater level in the bell-jar. Consequently the pressure acting to drawoli" gas can'be adjusted -and regulated by tilting tubes 24 and 26 aboutjoint 25. Tubes 24 and 26 can be tilted'around the pvot by any suitablemeans.

Normally, no'or very little water will flow from bell-jar 3 back intothe open trayas the liquid .level in bell-jar 3 will remainsubstantially constant and any aspiratedwater flows oli through tube 24.It shall now be assumed'that the liquid level within bell-jar 3 beginsto sink due toA a leakage o-f valve II.. The water cannot flow backthrough conduit I4 into the open tray since the Vair cushion withinclosed container I6 of seal I5 will prevent such back flow. Hence theliquid will be forced to ilow oiI through communicating tubes I8 sincetherwater column above tube I9 will overcome the hydrostatic pressure ontube 20. Consequently, watervwill iowl out through container`2l andpipe20 until theliquid leveljin -bel l`jar3 corresponds to; the liquidlevel outside of the bell-jar. vI hereby accomplish that none hemden 3oAserves to asm-it water from the bodfyzofwater trayxl into bell jar 3.The end of'conduit 33 communicating with trayl `may be Hush with thebottom of tray I.

end of the conduit is covered by a closed receptacle roneontainer3Imwhich is provided with one or .more openings 32 disposed slightlybelow the level ori` the end of conduit-.33m practice about 1/3 to Theother A of an inch. This arrangement serves asl a seal permitting theflow of water from tray I through `conduit 34 into bell jar13andpreventing a ilow of liquid in the opposite direction. u

` The air cushion formed within container 3| by the water filling thecontainer up to the level of eonduit 30 permits the inflow of Waterthrough conduit 39 and the outflow `through openings 32` but resists aninflow? of water `through openings 32 and outflow through conduit 30'.The water column in container 3l is balanced by the water eolurrmvhindicated in Fig. 3.

l. The discharge of waterirom` the belljar is con.- trolled. by a secondseal. 1 havefound. it`preferable to provide a seal comprising a U-shapedtube 33 which connects bell-jar 3 with a closed containerf34. `Thiscontainer is placed tightly on the bottom of tray I, for instance, by.inserting it into a circular groove35 provided in the bottom ottray I.

The end of tube 33 within.` container 34 is preferably on the same levelas overliow tube 6.. A second tube 36 serves to discharge water fromcontainer 34 into waste or anyother ,convenient place. The: second sealpermits a ilow water only in the direction from bell-jar 3 to waste.`Water entering container 34 through U- tube 3 3 will be dischargedthrough pipe 36 but a reversed flow is not possible `due to the aircushion found within closed container 34. This air cushionwill ,preventthe inflow of water through pipe 36.: The function of container 3I issimilar to the function of. seal I5.

The treating gas, for example, chlorine, is admitted in the bell-jarthrough float valve II as `described in connection.. with Figures 1 and2.

Thechlorine is withdrawn from the bell-jar through a pipe 31, the top ofwhich ends above the level of the liquid within the bell-j ar ascontrolled by oat valve II. The lower end of pipe 31 is widened to forma cylinder 38. Within cylinder is disposed an orifice tube 39 having anoriceAIl. Orice tube 39 surmounts a pipe 4| vserving to dischargechlorine drawn through orifice 40 and water entering at the bottorn oforice tube 39 through openings or vents 42. Pipe 4I communicates withthe throat of in- `lector 64. Cylinder 38` is placed in a secondcylinder open at' the top. Water is admitted into thisiopen cylinder bymeans of a tap or spigot 44` communicating with the interior of bell-jar3.

"Ihe fiow ofwater through spigot 44 VmayV be controlled -by a valve 45of conventional design. One

or more openings 46 close to the bottom of cylinder 33 `connect. thebodyof water in cylinder 43 luwi'th the interior of'cylinder 38 which,` inturn, communicates with'the interioror oriiicecylinder 33 through ventsor openings 42. i Consequently A water admitted through tap 44 `intocylinder 43 will enter the orifice tubeA and be` aspirated throughdischarge pipe 4I'.` The; innerdiameter at the top 41 of this pipe oratanyother suitable po-int of the length is preferably so far. reducedthat it is only slightly larger than the diameter of orifice 49. Outercylinder 43lisy connected: `by `an intermediate pipe 48 withr a tube 49(whichis pivotal. about pivot point 5U to permit an angular adjustmentof. pipe 49. Pipe 49 is connected with Waste by a ilexible tube 54, forexample, a rubber hose.

The operation of the apparatus is as: follows: Assuming water is iiowingthrough injector or aspirater 64 and water is admitted into Atray Ithrough spigot 1 then water will be sucked into bell-jar 3until'itreaches a substantially con.- stant level controlled by chlorinefloat valve II'. The; seal 3| includedvin conduit 30 connecting bell-jarand tray will not prevent such flow of water, since the seal is open inthis direction. Chlorine is aspirated through pipe 31 and orice 40 frombell-jar 3 and discharged through pipe 4I together with water enteringthis pipe. The negative head on the downstream side of orifice 40 willremain substantially constant and is equal to the column of liquidbetween the openings 42 and 41.v The` amount of chlorine which is drawnthrough orice40 will depend on the diierence between the water levelwithin cylinder 38 and the `water level in outer cylinder 43. The waterlevel within the orifice tube is determined by the upper edge ofdischarge pipe 4I. 'Ilie water level in outer cylinder 43 is determinedby the position of the over-flow level of tiltable tube 49. The watercolumn in cylinder 43 counterbalances the water column in cylinder 319.The lower the level of Water in cylinder 43, the less will be thedifference between the negative head on the upstream side of orice 40and on the downstream side of the orifice until finally' the pressure onthe upstream side of orifice 4|] becomes equal to the. pressure on thedownstream side at the level of the openings 46 which should be locatedslightly higher than the openings 42. 'Ihen no chlorine will be drawnthrough orifice 40. On the other hand, when the water column in cylinder43 reaches the level of the water column in cylinder 39 the pressure onthe upstream side oi orifice 40 will be equal to atmospheric pressureand the pressure drop across orice 40 will reach a maximum, the negativepressure on the downstream side of the orifice remaining constant.

The adjustable tube 49 affords a simple means for controlling the waterlevel within cylinder 43. Since cylinder 43 and tube 49 formcommunieating tubes, the water level within cylinder 43 and with it thevolume of gas drawn through orice 40 can be regulated by the simpleexlpedient of adjusting the angular position of tube 49.

When the water level within bell-jar 3 recedes, for example due to aleakage of oat valve II or an increased chlorine pressure within belljar3, the water cannot ow .back from be11-jar 3 into open tray I throughconduit 30, since the air cushion formed within container 3I will blockksuch back flow, as previously explained. Conso? quently, the water isforced to ow through con-A duit 33 into container 34 and is dischargedthrough pipe 36.

Figure 4 shows a third preferred embodiment of a sealing deviceaccording to my invention which isf very eiective and simple in designinapplication to a chlorinator of the' type shown in Figuresl and 2. i

The body of water intray I is connected with the interiorofY containero'r bell-jar 3f through a conduit 52,'both ends of which may be ush withthev bottom of tray I. vThis conduit permits a free circulation ofliquid in either direction; In order to prevent the floWof chlorinatedliquid from the bell-jar back into the open trayI, I include in conduit52-means which prevent the escape of chlorine from bell-jar 3 While theWater is flowing from the container through conduit 52 into tray I.These means are based upon the property of certain materials to reactwith chlorine dissolved in Water and to bind it While not entering intoany reaction with substantially pure water. These means, which may becalled a chemical valve, comprise a container 53 whichV connects two'sections of conduit 52. Container 53 is closed by a tight tting cover54. Of course, it ispossible to provide any other tight cover for thecontainer. The container is partly lled with a material 55 that willreact with chlorine in presence of water or with any other 'treatingmedium used. VMost metals, for example iron, zinc, 'copper or aluminumwill react with chlorine dissolved in water and bind it while they donot react With substantially pure water. The metals used should be in ashape offeringa large surface to liquid passing through container 53.They should not be heavily oxidized and b'e substantially free ofgreas'eand oil. They may be in granulated form or turnings or chips maybe used. In addition to metals highly adsorbent materials such as carbonin granulated form preferably activated carbon Will give good results. Y

The conduit section connecting the'tray with container 53 should endWithin the supply of metal or carbon 55 preferably close to the bottomof container 53 and the conduit section connecting bell-jar 3 withcontainer 53 may discharge through cover 54 ending ilush with it. InVorder to clean container 53 and material 55, a drain pipe 56 controlledby a conventional valve 51 .may be provided. From time to time material55 should be renewed preferably by means of a cover hole closed by astopper 58.

Substantially pure water iiowing from tray I into bell-jar 3 will not beaffected by the metal or carbon in container 53, but chlorine gasdissolved in the water will be bound by the metal or converted by thecarbonrin container 53 when discharged into this container throughconduit 52 from bell-jar 3', for example, if metal turnings are used,their respective metal chloride will be formed. Carbon will convertchlorine into hydrochloric acid which in this'dilution has no lsmell.A'fter having passed through container 53, the dechlorinated liquid`will continue through conduit 52 and ow back into Vtray I.

' Chlorine is' admitted into bell jar 3 through the pipe 9 controlled byvalve I0. The pipe 9 is provided at its top with a float valve I Iincluding tube 26 and the dischargetube 24 are pivotally arranged. Theo-peration of the chlorine discharge means has been described in detailin Vvconnectiori With Figures 1 and 2.

v- The sealing Vdeviceaccording to my invention hasbeen illustrated incombination with certain types of apparatus for applying a treatingmedium. However, as previously explained, 'my invention is not limitedto any particular type of apparatus. It is useful for all chlorinatorsofthe vacuum type and also for certain chlorinators of the so-calledpressure type. Furthermore, the sealing device according to my inventionisvnot' limited tothe admission of liquid into and discharge from themain bell-jar, but it can also be used for the admission of liquid intoand the discharge from an auxiliary bell-jar such as described in myco-pending application Ser. No. 441,261.

Finally, I do not want my invention to be limited dto the embodiments ofthe sealing device shown in the drawings and described herein, asvarious changes can be made without departing from the scope of myinvention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In an apparatus for supplying a sterilizing gas to a liquid to besterilized in combination an open receptacle in which is maintainedv abody of liquid, means for supplying 1iquid'to said receptacle, a closedcontainer placed in said open receptacle, means for admitting said gasinto said container, suction means for withdrawing said gas from saidcontainer and feeding it into said liquid to be sterilized, connectingmeans for admitting liquid from said receptacle into said gas filledcontainer and a liquid seal included in said connecting means preventingthe back flow or liquid charged with gas from said container into saidopen receptacle.

2. In an apparatus for supplying a sterilizing gas to a liquid to besterilized in combination a tray in which is maintained a body ofliquid, means for supplying said liquid to said tray, a closed containerplaced in said tray, means for admitting said gas into said container,suction means for withdrawing said gas from said container and feedingit into said liquid to be sterilized, connecting means for admittingliquid from said tray into said `gas lled container, a seal included insaid connecting means preventing the back ow of liquid charged with gasfrom said container into said tray, and means for discharging liquidfrom said gas lled container into waste. l y Y Y3. In an apparatus forsupplying a sterilizing gas to a liquid -to be sterilized in combinationa tray in which is maintained a body of liquid, means for supplying saidliquid, a closedcontainer placed in said tray,V a conduit forVdischarging liquid from said tray into said container, a seal includedin said conduit for permitting the ow of liquid only in the directionfrom said tray to said container, said seal comprising a closedreceptacle provided Within said Container into which receptacl'esaidconduit discharges and which communicates with' thecontainer at a levellower than the discharge level of said conduit, a second conduit `fordischarging liquid from said container into waste, a second sealincluded inv said second conduit for discharging liquid from saidcontainer introA waste, saidsecond seal comprising a closed receptacleinto vwhich said second Vconduit discharges and which is connected withWasteat a level lower than the discharge level of said second conduit,meansifor admitting said gas into said container and suction'means forwithdrawing said gaswfrom said container 4and feeding it intosaid liquidto besterilized;

l 14.- In an` apparatus for supplying a sterilizing gas 4to a liquidtobe sterilized, in combination a tray in which is maintained a body ofliquid, means for supplying said liquid, a closed container placed in`said tray, a conduit for discharging liquid from said tray into saidcontainer, a liquid seal included in said conduit open for the ilow ofliquid only in the direction `from said tray into said container,communicating tubes for discharging liquid from saidicontainer intowaste, one branch ofsaid tubes opening into said container and the othercommunicating with waste, means for admitting said gasl into saidcontainerl and suction means for withdrawing said gas from saidcontainer and feeding it into said liquid to be sterilized.

i 5. lIn an apparatus for supplyingsterilizing gas tolliquid to besterilized in combination a'tray` in whichis maintained a body ofliquid, means for supplying said liquid, a closed container placed'in`saidktrayja conduit for discharging liquid from saidtray into saidcontainer, a liquid seal included inxsaidconduit open for the ilow'ofliquid only in the `direction fromv said tray into said container, meansfor discharging liquid from said container `tolwaste, means foradmitting said gas into said container, and means for withdrawing saidgas from said container at a controlledrate and feeding it into saidliquid to be sterilized, said latter means comprising a member providinga flowcontrolling orice, a suction device for drawing said gas throughsaid flow-controlling orifice and a member for controlling the drop ofpressure across the orifice and feeding said gas drawn through saidorifice by said suction device into said liquid to be sterilized.

6. In an apparatus, asdescrbed in claim 19,

` said control member being pivotally arranged for oniy in the directionfrom said tray to Said benjar, said seal comprising a closed receptacleprovided Within said bell-jar into which receptacle said conduitdischarges and which communicates with the bell-jar at a level lowerthan the discharge level of said conduit, a second conduit fordischarging liquid from said bell-jar into waste, a second seal includedin said second conduit open for the ow of liquid only in the directionfrom said bell-jar into waste, means for admitting gas into saidbell-jar, means for withdrawing gas from said bell-jar and feeding itinto said liquid to be sterilized, said latter means comprising a memberproviding a now-controlling oriiice having an upstream side and adownstream side, a suction device for drawing said gas through saidflow-controllingoriiice, and a member for feeding said gas drawn throughsaid orifice by said suction device into said liquid to be sterilizedand means for controlling the ow of said gas through said orifice, saidcontrolling means including means `for maintaining a certain pressuredrop of the gas from the upstream side to the downstream side of saidflow-controlling orifice, means for counter-balancing said pressure atleast partly, and means for regulating said counterbalancing means.

, 8. In an apparatus for supplying a sterilizingr gas to a liquid to besterilized in combination an openreceptacle in which is maintained abody of liquid, means for supplying liquid to said receptacle, a closedcontainer communicating with said open receptacle, means for admittingsaid gas into saidl container, means for withdrawing said `gas fromsaid-container and feeding it into said liquid to be sterilized, aconduit connectingv said open receptacle with said container forpermitting aY free ilow of liquid between said open receptacle and saidcontainer and means included in said conduit adapted to arrest any gasdissolved in the liquid being within said container while: the liquidiiowing between the receptacle and the container is passed through saidmeans, thus preventing the back flow of gas from said container intosaid open receptacle.

9. In an apparatus for supplying a sterilizing gas to a liquid to besterilized in combination an open receptacle in whichv is maintained abody of liquid, means for supplying liquid to said receptacle, a closedcontainer placed in saidopen receptacle, means for admitting said gasinto said container, means for withdrawing said gas from said containerand feeding it into said liquid to be sterilized, a conduit connectingsaid open receptacle with said container for permitting a free ow ofliquid between said receptacle and said container, a supply of materialadapted to react chemically with said gas dissolved in said liquid andto bind it included in said conduit, thus freeing the liquid owingbetween the receptacle .and the container from dissolved gas while saidliquid is flowing back through said conduit from said container intosaid receptacle.

10. In'an apparatus for supplying chlorine to a stream of water incombination a tray in which is maintained a body of water, means forsupplying water to said tray, a closed container placed in said tray,means for admitting said chlorine into said container, means forwithdrawing said chlorine from said container and feeding it into saidstream of water, a conduit connecting said tray with said container forpermitting a free flow of water between said tray and said container, asupply of metal adapted to react with chlorine dissolved in waterincluded in said conduit for binding any chlorine dissolved in the waterwhile being within said container when the water owing between thereceptacle and the container is in contact with said supply of metal,thus preventing the escape of chlorine from said closed container intothe open.

11. In an apparatus for supplying chlorine to` a stream of water incombination a tray in which is maintained a body of Water, means forsupplying water to said tray, a closed container placed in said tray,means for admitting said chlorine into said container, means forwithdrawing said chlorine from said container and feeding it into saidstream of water, a conduit connecting said tray with said container forpermitting a free flow of water between said tray and said container, asupply of carbon adapted to react with chlorine dissolved in waterincluded in said conduit for binding any chlorine dissolved in the waterwhile being within said container when the water flowing between thereceptacle and the container is in contact with said supply of carbon,thus preventing the escape of chlorine from said closed container intothe open.

12. In an apparatus for supplying chlorine to a stream of water incombination a tray in which is maintained a body of water, means forsupplying water to said tray, a closed container placed in said tray,means for admitting said chlorine into said container, means forwithdrawing said activated carbon, thus preventing the escape ofchlorine from said closed container into the open.-

13. In an apparatus for supplying chlorine to a stream of water incombination a tray in which is maintained a body of water, means forsupplying Water to said tray, a closed container placed in said tray,means for admitting said chlorine into said container, means forwithdrawing said chlorine from said container and feeding it into saidstream of Water, a conduit connecting said tray with said container forpermitting a free ow of water between said tray and said container, areceptacle containing pieces of metal adapted to react with chlorinedissolved in Water included in said conduit for binding chlorinedissolved in the Water when water containing dissolved chlorine ispassing through said receptacle, thus freeing the water iiowing throughthe conduit from said chlorine while said water is o'wing through saidreceptacle.

14. In an apparatus for supplying `chlorine to a stream of water incombination a tray in which is maintained `a body of water, means .forsupplying Water to said tray, a closed 'container placed in said tray,Ameans for admitting said chlorine into said container,V means for with;drawing said chlorine from said vcontainer and feeding it into saidstream of Water, a conduit connecting said tray with said container forper` mitting a free flow of water between said tray 'and said container,a receptacle containing pieces of carbon adapted to react with chlorinedissolved in water included in said conduit for binding chlorinedissolved in the water 'within said container while the water flowing'through the confduit is passing through said receptacle,'thus free'- ting said water from dissolved chlorine while chlo`` rinated Water isilowing from said container through said conduit and Said receptacleinto said tray.

GEORG ORNSTEIN.

